Some of the web sites that BHCC is involved with (either 'd'esigned, designed in conjuction with 'S'anborn Advertising, 'm'aintain, just 'h'elp with when they have questions/problems, or any combination thereof):

Gibson Research - a variety of tools and information to help make your computer more secure
Gibson Research - Shield's Up! - a good test of how secure your connection is to the internet. Now tests UPnP exposure.
Gibson Research - Security Now! - podcasts of Steve Gibson discussing security issues with Leo Laporte.

The Internet Health Test checks your connection for signs of any degradation at all. With enough people taking part around the country every day, we can make sure that ISPs don't get away with breaking the rules.DSL Reports - useful information about DSL and cable, including speed testsSpeedtest.net - good site to test your internet speeds to different servers around the world.

Maybe a website loading speed isn't a client side problem but is a problem at the host. dotcom-monitor.com has a variety of tools to monitor the performance of your website from different locations around the world.

Windows Defender Security Center comes built into Windows 8 and 10. Many 3rd party Anti-Virus (AV) programs break Windows security so they can look into various areas of the operating system, in the process they actually create holes in the operating system. Because Windows Defender Security Center is built in it doesn't need to poke holes into the operating system and therefore is more secure. It is my personal recommendation for any system running Windows 8 or 10.

To determine which AV program you should use, you need to weigh speed and overhead requirements of the AV program and how well it protects you. AV-comparatives does both types of testing (and they test free versions). Because of the ever-changing nature of viruses, malware, etc. the latest detection test doesn't tell the whole story of the program. It is quite possible that for one test a program may perform extremely well, yet in previous tests it performed poorly. The opposite is also true. Therefore you need to look at several tests to see a longer term performance of a particular program.

While security suites may provide some security features that are not already included in Windows, most, if not all of those features are available for free from other sources. It may be less convenient than having everything in one program, but usually you have better protection using products from different sources and you can tailor the protection to your needs, not what the suite provider requires you to have. Also, most of the all-in-one solutions add more overhead than their protection is worth.

Pop-up blocker tests - takes a while to run through all of the tests, but gives a very good indication of how well your pop-up blocker works.